tag:blogger.com,1999:blog-7321821.post112227052455252579..comments2023-12-13T04:18:15.075-08:00Comments on Blue Cat Blog: 12 penniesRuss Abbotthttp://www.blogger.com/profile/15431389045571531450noreply@blogger.comBlogger5125tag:blogger.com,1999:blog-7321821.post-1122360167119696072005-07-25T23:42:00.000-07:002005-07-25T23:42:00.000-07:00Thanks. I guess Google knows everrything. Here a...Thanks. I guess Google knows everrything. Here are two sites that discuss this problem in detail. http://www.iwriteiam.nl/Ha12coins.html gives the answer above along with some others. http://www.cut-the-knot.com/blue/weight1.shtml gives other solutions.Russ Abbotthttps://www.blogger.com/profile/15431389045571531450noreply@blogger.comtag:blogger.com,1999:blog-7321821.post-1122358415475365122005-07-25T23:13:00.000-07:002005-07-25T23:13:00.000-07:00whoops, 4 is left, none, right.whoops, 4 is left, none, right.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-7321821.post-1122358220824804902005-07-25T23:10:00.000-07:002005-07-25T23:10:00.000-07:00each coin is in a unique group of weighings.1 is i...each coin is in a unique group of weighings.<BR/><BR/>1 is in left, left, left<BR/>2 is in left, left, right<BR/>3 is in left, left, none<BR/>4 is in left, right, none<BR/>etc.<BR/><BR/>Also no opposite pattern to any of these is taken.<BR/><BR/>So if the scales tipped left, left, left you'd know 1 was heavier.<BR/>If it was the opposite, right, right, right, then 1 was lighter.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-7321821.post-1122357461394142752005-07-25T22:57:00.000-07:002005-07-25T22:57:00.000-07:00Once you you've done those weighings, how do you d...Once you you've done those weighings, how do you decide which is the bad coin?Russ Abbotthttps://www.blogger.com/profile/15431389045571531450noreply@blogger.comtag:blogger.com,1999:blog-7321821.post-1122286076063106962005-07-25T03:07:00.000-07:002005-07-25T03:07:00.000-07:00weigh 1, 2, 3, 10 vs. 4, 5, 6, 111, 2, 3, 11 vs. 7...weigh 1, 2, 3, 10 vs. 4, 5, 6, 11<BR/>1, 2, 3, 11 vs. 7, 8, 9, 10<BR/>1, 4, 7, 10 vs. 2, 5, 8, 12Anonymousnoreply@blogger.com